Don't mean to sound like an asshole but I don't think this is an Olympic Edition.... for the following reasons..
Olympic Edition wasn't available in Tungsten, only Heron, Orion, Cinnibar, Granada and Bermuda
You should have an Olympic Edition badge on your boot and no Executive badge
Olympic Edition came with Alloy wheels as standard
Olympic Edition had thicker black moldings on the doors with a chrome strip through them and chrome strips around the front and rear bumpers.
Olympic Edition had a chrome exhaust tip.
If you want to be certain look at the build plate above your passenger side head light. You should have the option code A8B if it is an Olympic edition.
No matter what it is, it's still a nice, tidy car and looks like its in great condition. Would look sweet dumped on its ass with some alloys.